Bilthoven weather in April

In April, Bilthoven sees average daytime highs of 14°C and overnight lows near 5°C, with 51 mm of precipitation across 11.3 wet days and about 13.6 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 16°C by the end. The sky is clear or mostly clear about 20% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of April to 14 h 30 min by month's end. Set against the rest of the year, April is Bilthoven's 2nd-clearest and 8th-windiest month. For the whole year in context, see Bilthoven's year-round climate.

Daytime high
14°
7th warmest
Overnight low
6th coldest
Precipitation
51 mm
11.3 wet days
Daylight
13 h 36 min
5:51 AM – 7:28 PM
Cloud cover
66%
2nd clearest
Wind
14 km/h
8th windiest
Solar energy
4.25 kWh/m²
Travel score
3.8
out of 10

Bilthoven is village in the Netherlands.

Air quality
Elevated
PM2.5 16.4 µg/m³ · 2010

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 12°C in the first days to 16°C by the end.

A typical April day in Bilthoven reaches about 14°C in the afternoon and slips back to 5°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 20°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1124
2124
3124
4124
5124
6124
7124
8134
9135
10135
11135
12135
13135
14135
15145
16145
17145
18145
19146
20156
21156
22156
23156
24156
25157
26157
27157
28167
29167
30167

How April really feels in Bilthoven

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Bilthoven weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6412.61.280.3
Feb / 5410.71.59.50.6
Mar10° / 5511.50.811.52.0
Apr14° / 5111.30.113.63.8
May17° / 6311.8015.45.3
Jun20° / 12°6711.7016.45.8
Jul22° / 14°8214.10166.0
Aug22° / 14°8113.1014.46.0
Sep19° / 11°6712012.45.5
Oct14° / 6512010.43.8
Nov / 6112.30.38.51.8
Dec / 7013.11.37.60.5

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33466
43565
53466
63466
73565
83466
93466
103466
113664
123664
133763
143763
153862
163961
173961
183961
193961
203961
213961
223763
233763
243763
253763
263664
273664
283664
293664
303565

Chance of precipitation in April

Any precipitation

Bilthoven gets around 51 mm of rain and snow over 11.3 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 37% and peaks near 41% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
337
437
537
637
737
837
936
1036
1136
1236
1335
1435
1535
1635
1735
1836
1936
2037
2137
2238
2338
2439
2539
2639
2740
2840
2940
3041

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
25991
26991
27991
28991
29991
30991

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 36 min at the start of April to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 114 minutes over April. Sunrise moves from 6:26 AM to 5:21 AM, and sunset from 7:02 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:267:02
212.76:237:04
312.76:217:05
412.86:197:07
512.96:167:09
612.96:147:11
713.06:117:12
813.16:097:14
913.26:077:16
1013.26:047:18
1113.36:027:19
1213.46:007:21
1313.45:587:23
1413.55:557:25
1513.65:537:26
1613.65:517:28
1713.75:487:30
1813.85:467:32
1913.85:447:33
2013.95:427:35
2114.05:407:37
2214.05:377:39
2314.15:357:40
2414.15:337:42
2514.25:317:44
2614.35:297:46
2714.35:277:47
2814.45:257:49
2914.55:237:51
3014.55:217:52

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.25 kWh/m².

For context, solar energy here swings from a low near 0.56 kWh/m² to a high of 5.26 kWh/m² in June across the year — April's 4.25 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.6Moderate
33.6Moderate
43.7Moderate
53.7Moderate
63.8Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Bright
114.1Bright
124.1Bright
134.2Bright
144.3Bright
154.3Bright
164.4Bright
174.4Bright
184.5Bright
194.5Bright
204.5Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in April

Is April a good time to visit Bilthoven?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.8
Sightseeing
6th-best month of the year
0.1
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Bilthoven.

What to pack for Bilthoven in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Bilthoven sees daytime highs around 14°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Bilthoven in April

The nearest coast averages about 9°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 56 km away) is warmest in August at about 19°C and coldest in February near 5°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan6Bracing
Feb5Bracing
Mar6Bracing
Apr9Bracing
May12Bracing
Jun15Bracing
Jul18Cool
Aug19Cool
Sep18Cool
Oct15Bracing
Nov11Bracing
Dec8Bracing

UV index in Bilthoven in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bilthoven peaks around July 15 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 15UV 6Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Bilthoven in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Bilthoven is worst in March — around 20 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 12 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Bilthoven's WHO annual average of 16.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2420 µg/m³Dec 1012 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb16Moderate
Mar20Moderate
Apr20Moderate
May19Moderate
Jun18Moderate
Jul16Moderate
Aug18Moderate
Sep16Moderate
Oct14Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Bilthoven?

Bilthoven sits at 52.1°N, 5.2°E, 6 m above sea level, in The Netherlands. The nearest listed city is Zeist, 5.0 km away.

Topography around Bilthoven

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bilthoven.

Within 3 km, the terrain around Bilthoven has only modest variations in elevation — a maximum elevation change of 30 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 83 m; within 80 km, only modest variations in elevation — a maximum elevation change of 140 m.

The land around Bilthoven is covered by trees (68%) within 3 km, trees (39%) and grassland (35%) within 16 km, and grassland (34%) and water (20%) within 80 km.

3 km
30 m
16 km
83 m
80 km
140 m
treesgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Zeist 5.0 km · Utrecht 7.0 km · Soest 8.0 km · Driebergen-Rijsenburg 10 km · Hilversum 11 km · Baarn 11 km · Maarssen 11 km · Leidsche Rijn 11 km

The Netherlands travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 84% of US
price level, 2025
GDP per capita
$73,684
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 624
Religion
none 54%Roman Catholic 20%Protestant 15%other 6%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bilthoven (52.13°, 5.2014°, elevation 6 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).